Hi,
There is a problem when I have a date pick field and an image field in the same content type (backend form).
I can not load anything in the image field: I click on "select", the popup opens, I select an image on the server, I click on "insert" and nothing happens.
In the console I have the error:
ReferenceError: jBusyUploading is not set > f2c_imageupload.js: 92: 18

All is working fine when I remove the date pick field.
Any idea?
Thanks

I tried to reproduce this issue on my machine, but here it works without a problem.
Can you give me an admin account on your site, so I can see it myself?
Do you also have Akeeba Back-up installed so I can take a back-up when I need one for debugging?